tree-vrp.c (intersect_ranges): If we failed to handle the intersection choose a const...

tree-vrp.c (intersect_ranges): If we failed to handle the intersection choose a constant singleton range if...

2016-09-30  Richard Biener  <rguenther@suse.de>

	* tree-vrp.c (intersect_ranges): If we failed to handle
	the intersection choose a constant singleton range if available.

From-SVN: r240647